<html>
<head>
<script>
function boom()
{
  var tbody = document.getElementById("tbody");
  tbody.style.overflow = "auto";
  document.body.offsetWidth;
  tbody.style.overflow = "";
}
</script>
</head>

<body onload="boom();">

<table border="1">
  <tbody id="tbody">
    <tr>
      <td>
        <p>A</p>
        <p style="height: 18000000px">B</p>
      </td>
    </tr>
  </tbody>
</table>

</body>
</html>
